CipherLab RK25 User Manual page 26

RK25 OS Image Upgrade SOP
3) Enter this folder to check if there's any files in it. Empty folder means auto-backup is
failed.
ENTER DOWNLOAD MODE
To enter "
Download Mode
1) Remove the main battery from the RK25 mobile computer for at least
then install the main battery.
26
(from Android Nougat to Android Pie)
" after failing to upgrade OS image:
○
1
○
User Guide
Press down
the lock button.
Lock icon: The battery
cover is currently locked.
Lock Button
Slide rightward.
2
, and
5 minutes
Unlock icon:
The battery cover
is now unlocked.